The present invention relates to an LED
light emitting device comprising a backlight module. The backlight module comprises an LED
light source and a light guiding plate. The device further comprisesa light guiding column, and the light guiding column comprises an incident surface for receiving a
light beam, a bottom surface connected to the incident surface, and an
exit surface opposite to the bottom surface. The bottom surface is provided with a network spot structure for converting an incident
light beam into parallel light to send the parallel light out, the light guiding column is arranged on a light incident side of the light guiding plate, and the light
exit surface faces the light guiding plate. The LED
light source is corresponding to the incident surface of the light guiding column, the
light beam emitted by the LED
light source enters into the light guiding column from the incident surface, and after the network spot structure converts the incident light beam into the parallel light, the parallel light is emitted into the light incident side of the light guiding plate from the
exit surface. The LED
light emitting device has the advantages of reasonable design, simple structure and good uniformity of light entering the light guiding plate, the incident light of the backlight module is uniform, a poor Hotspot phenomenon can be eliminated, the design difficulty of light guiding plate network spots is reduced, the number of LEDs is reduced, and the cost is reduced.